Styrene Butadiene Rubbers (SBRs) are among the most useful synthetic rubbers which can be produced by two different methods of polymerization: emulsion and solution. These two polymerization methods lead to different final properties. In general, SBRs produced by the solution method (S-SBRs) have narrower Molecular Weight Distribution (MWD), higher content of cis-1,4 structure and lower glass t...

this research work is devoted to experimental and theoretical evaluations of a hybrid constitutive model which was designed to simulate the mechanical behavior of a tread rubber compound. the model is a combination of yeoh hyperelastic model with a strain-rate hysteresis model developed by bergstrom and boyce. the parameters of the yeoh model were calibrated from experimental data of the astm d...

this research work is devoted to the investigation on the use of silica on the fatigue-to-failure property of a tire tread compound. a reference compound was frst designed in which 60 phr carbon black was used as the reinforcing fller. while keeping the total of fller content to be constant as 60 phr, three additional compounds with 5, 10 and 20 phr silica were then manufactured. the classical ...

A finite element modeling of tire using Ansys is used to analyze the free vibration of radial pneumatic tires. The natural frequencies and mode shapes of pneumatic tires are investigated. The effects of some parameters such inflation pressure, tread pattern, ply-angles and thickness of belts on the natural frequency of tires are investigated. Keywords— natural frequency, inflation pressure, tre...

They say fools of venture where angels fear to tread . Up until now , there's been no precedent for a successful technology merger of the size of the HP and Compaq merger. The most quoted failure is the merger of computer vendors Burroughs and Sperry. In 1986 these two merged their dissimilar operations and very different corporate cultures. Unisys, the resulting company, briefly held second pl...

The application of Leuco Crystal Violet (LCV) for the enhancement of footwear and fingerprint impression evidence was first utilized in the FBI Laboratory in late 1993, after learning from Mr. John F. Fischer (1) of the formulation of this reagent. Mr. Fischer subsequently made a presentation on this topic at the International Symposium on Footwear and Tire Tread Impression Evidence at the FBI ...